Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual classificação média tem um valor de ganhos inferior a $224.589?
 ###Tabelas: CREATE TABLE title_holders_from_1964_until_1972 (title_holders_from_1964_until_1972_id AUTO_INCREMENT PRIMARY KEY, Year INT, Binibining Pilipinas-Universe VARCHAR, Binibining Pilipinas-International VARCHAR, Miss Maja Pilipinas VARCHAR, First runner-up VARCHAR, Second runner-up VARCHAR, Third runner-up VARCHAR, Fourth runner-up VARCHAR) CREATE TABLE leaders (leaders_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Player VARCHAR, Country VARCHAR, Earnings( $ ) INT, Wins INT) CREATE TABLE outdoor_sports (outdoor_sports_id AUTO_INCREMENT PRIMARY KEY, League VARCHAR, Sport VARCHAR, Season VARCHAR, # of Teams INT, Games INT, Total attendance VARCHAR, Average attendance INT) CREATE TABLE eastern_conference_quarter-finals:_vs._8 (eastern_conference_quarter-finals:_vs._8_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Venue VARCHAR, Visitor VARCHAR, Score VARCHAR, Home VARCHAR, Decision VARCHAR, Attendance INT, Series VARCHAR) CREATE TABLE third_division_final_table (third_division_final_table_id AUTO_INCREMENT PRIMARY KEY, Position INT, Team VARCHAR, Played INT, Drawn INT, Lost INT, Goals For INT, Goals Against INT, Goal Difference VARCHAR, Points 1 VARCHAR)  
SELECT AVG Rank FROM leaders WHERE Earnings( $ ) < 224,589